<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2018 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------

namespace think\db;

class Expression
{
	/**
	 * 查询表达式
	 *
	 * @var string
	 */
	protected $value;

	/**
	 * 创建一个查询表达式
	 *
	 * @param  string $value
	 *
	 * @return void
	 */
	public function __construct($value)
	{
		$this->value = $value;
	}

	/**
	 * 获取表达式
	 *
	 * @return string
	 */
	public function getValue()
	{
		return $this->value;
	}

	public function __toString()
	{
		return (string) $this->value;
	}
}
